http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ralstonia Solanacearum에 감염된 토마토에서 ACC Deaminase를 생산하는 Methylobacterium spp.의 스트레스 에틸렌 수준 조절
임우종 ( Woo Jong Yim ),김기윤 ( Ki Yoon Kim ),우성만 ( Sung Man Woo ),이선미 ( Seon Mi Lee ),홍보희 ( Bo Hui Hong ),사동민 ( Tong Min Sa ) 한국환경농학회 2012 한국환경농학회 학술대회집 Vol.2012 No.-
Biosynthesis of ethylene is usually enhanced with severity of pathogenic infection. Some ethylene synthesis inhibitors are known to significantly decrease the severity of pathogen infections in plants. Bacteria of genus Methylobacterium have been found to stimulate plant growth and regulate the level of ethylene in crop plants. A selective decrease of ethylene can be achieved by plant growth promoting bacteria, for instance Methylobacterium, containing ACC (1-aminocyclopropane-1- carboxylate) deaminase, which cleaves ACC into -ketobutyrate and ammonia in higher plants which leads to reduced ethylene level. This work aimed to test the induction of defense responses in tomato against bacterial wilt by stress ethylene level reduction mediated by the ACC deaminase activity of Methylobacterium strains. In greenhouse experiments, the disease index value observed in Methylobacterium strains treated tomato and red pepper plants were lower than that of uninoculated treatment. Plants treated with Methylobacterium strains challenge inoculated with Ralstonia solanacearum (RS) showed significantly reduced disease symptom and lowered ethylene emission under greenhouse condition. The ACC and ACO (1-aminocyclopropane-1- carboxylate oxidase) accumulated in the tomato leaves were significantly reduced with Methylobacterium strains inoculation compared to treatment with pathogen alone. Similar to ACC oxidase activity, ACC oxidase related gene expression also increased in tomato treated with Ralstonia solanacearum alone compared to Methylobacterium strains treatment. In addition pathogenesis-related (PR) proteins related to ISR (Induced systemic resistance) including -1,3-glucanase, phenylalanine ammonia-lyase (PAL), peroxidase (PO) and polyphenol oxidase (PPO) were increased in Methylobacterium strain inoculated tomato plants. A significant increase in -1,3-glucanase and PAL related genes expression was found in all of the Methylobacterium spp. treatments compared to the Ralstonia solanacearum alone treatment. This study supports that the Methylobacterium strains might increase the activity of defense enzymes by modulating the ethylene biosynthesis pathway, suggesting the possibility of using Methylotrophic bacteria as potential bio-control agents.
Integral Absolute Mean Curvature를 이용한 다면체 간략화 기법에 관한 연구
김남우(Nam Woo Kim),임우종(Woo Jong Lim),안효민(Hyo Min Ahn),이병국(Byung Gook Lee) 한국컴퓨터게임학회 2004 한국컴퓨터게임학회논문지 Vol.5 No.-
According to Stan Melax's Edge cost formula which is fast and effective but don't fitted for characteric point. The short comings of Stan Melax approach is over come by curvature approach which is fitted for characteric point but it is not so effective. Our proposed formula having advantages of both formula that is simulated with Stan Melax approach and Integral approach. It is simple, effective and fitted for characteric points. 대용량의 데이터를 처리하기 위한 그래픽스 알고리즘을 Simplification이라 하며, Stan Melax의 Edge cost기법은 간결한 수식에 비해 빠르고, 효과적이어서 VRML이나 게임엔진 등에서 널리 응용되어지고 있는 좋은 예이다. 특히, 오늘날 Curvature를 이용한 Simplification방법들이 많이 제안되고 있는데, Edge cost 방법은Curvature를 이용한 Simplification 방법에 비해 각각의 연산수행이 느리고, 특징 점들을 잘 보존하지 못하는 단점이 있다. 본 논문에서는 Integral Absolute Mean Curvature에 Stan Melax의 Edge cost기법을 접목하여, 두 알고리즘의 장점들을 모두 보존할 수 있는 효과적인 Simplification 방법을 제안하고자 한다.